Mold.



1 9 om 2 W d d R w am P lmmm I- n u n J J n r m j 1- F|||L L 5 Z P- 7 w 9 E m 4 0 w 1 1 i I I v THE NORRIS PETERS CO.. PHOTO-LITHQ. WASHINGTON. D. C.-

UNITED STATES" PATENT OFFICE.

WILLIAM w. DOOLITTLE, or nvnnsron, ILLINOIS, ASSIGNOR 'ro CRANE COMPANY;

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MOLD.

Specification of Letters Patent. 7

Application filed January 2, 1909. -Serial No. 470,343.

Patented July 28, 1914.

To all whom it may concern:

Be it known that I, WILLIAM W. DOOLIT- 'lLE, a citizen of the United States, residing at Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Molds, of which the following is a specification.

The invention relates to the formation of molds, and has for its principal objects; the provision of a mold which readily vents itself along the line of joinder between the mold sections; the provision of a mold which may be more easily and rapidly formed than the molds as heretofore made, and the provision of an improved method for the formation of sand molds.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of one of the half-flasks employed, in position for filling;

Figure 2 is a transverse section therethrough on the line II-II of Figure 1;

Figure 3 is a plan view of the mold;

Figure 4; is a section similar to that of Figure 2, but with the flask in advanced position;

Figure 5 is an end elevation of the mold;

Figure 6 is a transverse section through the complete and assembled mold, and Fig. 7 is a side elevation of a supporting member.

The mold as illustrated in the drawings is designed for the formation of a pipe elbow, but it will be understood that the mold may be applied to the formation of a large number of other articles. As illustrated in Figures 1, 2, and 8, 1 is a metal half-flask mounted for lateral movement upon a plate 2; 3 is the pattern which is mounted upon a pattern support 4:; 5 is a hopper for guiding the sand into the flask; and 6 is the member from which the sand is supplied. In operation, the space between the flask l and pattern 3 is filled with sand, and the flask is then moved to the position indicated in Figure 4:, thus pressing the sand against the pattern 3. The half-mold as thus formed is then removed, and a second flask is placed in position and a half-mold formed as above described. The half-molds thus formed are assembled about a green sand core 7, as indicated in cross-section in Figure 6, all of the parts being supported upon the mold board 8. The mold thus formed is now ready for pouring, which pouring is accomplished in the usual manner, through the gate 9. v 1

As a means for retaining the sand'fwhile the flask is being filled and during the. for mation o-f the mold, I provide the plates or members 10 which lie closely adjacent to the ends of the flask and bridge the gap between the face of the flask and the pattern plate, thereby serving to retain thesand and prevent it from spilling out the ends of the flask. The members 10 are shown in side and end elevation in Figs. 1 and 5, and in plan in Fig. 3, and their telescopic relation with the flask in its operative positions is clearly indicated in Figs. 2 and 4 from inspection of which it will be seen that as the flask is moved inwardly toward the pattern plate, it telescopes within the sand retaining members.

The foregoing procedure is advantageous, in that the mold may be very rapidly made, and when in assembled position the vertical line of joinder 3 between the mold sections provides for venting without the provision of additional means. It will also be noted that the metal flask members 1 and 2 approach in contour the outer surface of the article produced, thus reducing the amount of sand used and the weight of the mold to a minimum. Furthermore as the compression of the sand is in a horizontal direction, the formation of the mold and its removal is possible without interference with or removal of the means for supplying sand to the mold. The amount of sand necessary for the mold, and the consequent compression thereof is readily gaged by the distance back which the flask members are moved for filling, so that no measuring of the sand other than the filling of the open flasks is necessary. It is obvious that if desired the mold sections may be formed one at a time instead of simultaneously as indicated in Figure 4, and that the procedure is well desire to secure by Letters Patent is the following 1. A mold forming apparatus comprising in combination, a substantially horizontal supporting plate, a substantially vertical pattern member, a flask member on the supporting plate, one of the said members being movable toward and from the other, and means having telescopic relation with one of the said members for retaining the sand during the formation of the mold.

2. A mold forming apparatus comprising in combination, a substantially horizontal supporting plate, a substantially vertical pattern member, a flask member slidably carried on the supporting plate, and means having telescopic relation with the flask member for retaining the sand during the formation of the mold.

3. A mold forming apparatus comprising in combination, a substantially horizontal supporting plate, a substantially vertical pattern member, a flask member on the sup porting plate, one of the said members bein'g movable toward and from the other, and

WILLIAM W. DOOLITTLE.

WVitnesses:

PAUL CARPENTER, DONALD C. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents.

Washington, D. O." I 

